Paper bag



(No Model.) 2 sheets -sheet 2.

1). APPEL.

PAPER BAG. No. 340,075. Patented Apr. 20, 1886.

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UNITED STATES PATENT OFFICE.

DANIEL APPEL, OF CLEVELAND, OHIO, ASSIGNOR TO THE UNION PAPER BAG MACHINE COMPANY, OF PHILADELPHIA, PENNSYLVANIA.

PAPER BAG.

SPECIFICATION forming part of Letters Patent No. 340,075, dated April 20, 1886.

Application fileil'June 17, 1885. Serial No. 168,913. (No model.)

To aZZ whom, it may concern:

Be it known that I, DANIEL APPEL, a citizen ofthe United States, residing at Cleveland, county of Ouyahoga, and State of Ohio, have invented certain new and useful Improvements in Paper Bags, fully described and represented in the following specification and the accompanying drawings, forming a part of thesame.

This invention relates to what are known in the art and to the trade as bellows-sided squarebottom bags, it being the object of the invention to produce a bag of this class in which the plies of the material which are folded together in forming the bottom shall be evenly i5 distributed on both sides of the central line of the bottom, thereby making the bottom more pliable and of greater strength.

To this end the invention cousistsinanovel manner of folding the material in the formation of the bag-bottom, which will be hereinafter fully explained and pointed out.

In the drawings illustrating an embodiment of this invention, Figure 1 represents a portion of a bag-blank or of a continuous web from which the bag is to be made, and Fig. 2acrosssection thereof. Fig. 3 is a view similar to 'Fig. 1, showing the central portion of the end of the blank folded over upon the body thercof. Fig. 4 is a cross-section of the same,taken on the line 00 of Fig. 3; and Figs. 5 and 6 are longitudinal sections taken on the lines y and z, respectively,of the same figure. Fig. 7 represents a portion of said bag-blank when made into tubular form, and Fig. 8 a cross-section of 5 the same. Fig. 9 represents the opposite side of the bag-blank, showing the projecting flap folded over the end thereof, thus forming the bottom and completing the bag; and Fig. 10 is a longitudinal section taken on the line y of 0 Fig. 9. Fig. 11 is a perspective view of the bottom of the bag when the sameis opened and distended. Fig. 12 is a vertical section taken on the line to of Fig. 11. Fig. 13 is a horizontal cross-section looking toward the bottom of the bag, taken on the line 22 of Fig. 12; and Fig. 14 is a perspective view of the bottom portion of the bag, showing the corners thereof folded inward.

In the manufacture of this improved bag a continuous web of material may be employed,

as is customary in the art; or the bag may be madefrom detached blanks.

The continuous web or blank,instead of being made into tubular form simultaneously with the formation of theinfolded sides forming the well-known bellows-sided tube, will preferably be simply folded so as to provide the infolded sides, the formation of the longitudinal seam in the bag being left forasubsequent operation. The web or blank A thus folded 6c is illustrated by Figs. 1 and 2, wherein it is shown provided on either side ofitslongitndinal center with folds b c, which will form the bellows sides of the bag when the outer edges of the blank are brought together and united over the center, as will hereinafter appear.

The bottom-forming end of the web or blank is provided with two longitudinal incisions,

11 l2,which extend a short distance into the body of the blank, preferably upon eitherside 7o ofthe longitudinal folds b c, as seen in Fig. 1, and thus provide a central flap, 10, at the bottom-forming end of the blank. These short incisions may be made either before or after the folds b c are formed. \Vhen the bags are made from acontinuous web, the incisions 11 12 may be made at the same time that the web is severed transversely, or they may be made previously, they being located a bag-length apart along the web. \Vhen the incisions 11 8o 12 are made prior to the complete transverse severance of the web, atransverse cut may also be made between the ends of theincisions,so as to form the free flaps 10 before the web is entirely severed transversely. The central flap, 10, thus formed is then folded on the line 1, so

as to be doubled over onto the body of the blank, as shown in Figs. 3 and 4, thus leaving projecting flaps 13 14 at the end of the blank on either side of the flap 10, as shown in Fig. 0 3. After the flap 10 has been thusfolded back the blank, if a continuous web is used, is severed from the web. The edges of the bag-blank carrying the projecting flaps 13 14 are now folded over on the longitudinal creased lines 5 d and brought together at its center, where they are united by alongitudinal line of paste,

a, in the ordinary manner, thus forming the blank into tubular form,as shown in Figs. 7 and 8, the projecting flaps 13 14 being thus united 10o and brought to the center of the blank, form1 ing a single project-ing end flap, 15. This end flap, 15, is then folded on a transverselycreased line at its juncture with the body of the blank from the position shown in dotted lines, Fig. 10, over the end of the blank, so as to lie in contact therewith, and be united to the blank by a suitable line of paste, as seen in Figs. 9 and 10, thus completing the formation of the bag. It will be seen that the flaps 10 and 15, the length of which is governed by the incisions 11 12, are thus folded in opposite directions to each other, the former lying within the bottom of the bag, and ex'tending'in one direction from its center over the bottom, and the latter lying outside the bottom extending from its center over the bottom in theopposite direction, (see Figs. 11, 12, and 13,) thus supplementing the material forming the bottom evenly and adding increased strength to it, instead of supplementing only one side of the bottom, as in the old form of bag. Although these flaps 10 15' are shown as only extending partially across the bottom of the bag. they may be made of such length as to extend entirely across the same and supplement the entire surface of the bottom, it being only requisite in accomplishing this to increase thelength of the incisions 11 12, as is apparent. A bag thus formed may have its bottom corners turned within the bellows folds, as shown'in Fig. 14, in the usual manner, to provide the desired creases upon the bottom, which cause it,when the bag is opened and distended, to assume the rectangular or square form.

It is apparent that the inner folded flap, 10,

they are turned from the position seen in Fig.

3 to that of Fig. 7, to form the tubular structure, thus causing both flaps to be cemented to the bottom and a very close and tight bag to be formed.

The position of the incisions 11 12 may be varied at the desire of the manufacturer. They may be immediately at the sides of the bellows folds, thus increasing the flap 15in widthsoas to be equal to that of the tubularblankwr the said incisions might be so positioned as to make the flaps 13 14 when unitedof agreater width than the central flap, 10, and in either case the flaps 131.4, instead of the flap 10, might be folded over-so as to lie within the bottom of the bag when formed, the flap 10 being folded over the end of the blank so as to lieoutside the bag-bottom and complete the bag.

What I claim is I As a new article of manufacture, the hereindescribed bellows-sided bag,provided with the two bottom-closing flaps 10 15, the one folded within the bottom of the bag in one direction, and the other foldedon the outside thereof in the opposite direction, substantially as de scribed.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

DANIEL APPEL.

Witnesses:

GEo. H. GRAHAM, T. H. PALMER. 

